Back in late March Apple acquired indoor-GPS Company called WifiSLAM signaling that Apple could be entering the indoor mobile location services business sometime in the future. WifiSLAM's software allows a user's smartphone to pinpoint its location (and the location of friends) in real-time to 2.5m accuracy using only ambient WiFi signals that are already present in buildings. Today, a key patent application from Apple titled "3D Position Tracking for Panoramic Imagery Navigation" was published by the US Patent and Trademark Office. On one hand, the patent is about bringing detailed street-views to Apple's Map application. On the other hand, we get a smidgen of understanding as to why Apple acquired WifiSLAM. Apple's patent filing is very stingy in providing us with details about the second half of their invention. Apple states that "In some implementations, forward and backward translation enables the user to enter an indoor panorama of a structure (e.g., a commercial venue), " like a store for making a purchase. Although Apple has recently taken a bruising over their Map application's turn-by-turn navigation inaccuracies, it's crystal clear that they're charging ahead with determination to bring newly advanced services to Maps in the future.